上(うわ)の空(そら)

うわのそら
noun
absentminded, distracted
cognition
1. absentminded, distracted, inattentive
A mental state where one's attention is elsewhere and not focused on the present situation or conversation.
彼(かれ)は上(うわ)の空(そら)で聞(き)いていた。
He was listening absentmindedly.
話(はなし)を聞(き)いているのに上(うわ)の空(そら)だね。
You're supposed to be listening, but you seem distracted.
I was so worried about the exam that I was distracted throughout the class.

Etymology

Literally 'the upper sky' - suggesting that one's mind has floated up and away, not grounded in the present moment.

Common patterns